Hello Satish,

The prometheus_server_default_volumes variable is defined as:

prometheus_server_default_volumes: - "{{ node_config_directory }}/prometheus-server/:{{ container_config_directory }}/:ro" - "/etc/localtime:/etc/localtime:ro" - "{{ '/etc/timezone:/etc/timezone:ro' if ansible_facts.os_family == 'Debian' else '' }}" - "prometheus_v2:/var/lib/prometheus" - "kolla_logs:/var/log/kolla/"

As you can see, it configures a lot more than just how Prometheus data is stored. By default it uses the prometheus_v2 Docker volume. If you want to store your data in /mnt/prometheus, you can use:

prometheus_server_default_volumes: - "{{ node_config_directory }}/prometheus-server/:{{ container_config_directory }}/:ro" - "/etc/localtime:/etc/localtime:ro" - "{{ '/etc/timezone:/etc/timezone:ro' if ansible_facts.os_family == 'Debian' else '' }}" - "/mnt/prometheus:/var/lib/prometheus" - "kolla_logs:/var/log/kolla/"

Note that it won't move the data for you. If you want to keep existing data, stop prometheus_server containers and copy the data from /var/lib/docker/volumes/prometheus_v2/_data into /mnt/prometheus before applying this configuration.

Best regards, Pierre Riteau (priteau)

On Fri, 15 Sept 2023 at 04:29, Satish Patel satish.txt@gmail.com wrote:

Folks,

I have deployed prometheus with koll-ansible and now I want to change the path of prometheus volume to store matrices on bigger partitions. How do I change the volume path of prometheus to store matrix data on separate filesystem?

This is what I did in globals.yml but it doesn't work. Is the following variable correct?

prometheus_server_default_volumes: "/mnt/prometheus"